What do Ritalin pills look like?

I found some pills in my daughter's possession, and she says they are her Ritalin prescription, but they don't match anything on the Pill Identifier. They are small, white pills with a score down the middle of one side. On one side of the score is an "A", on the other side is a "B". On the back of the pill is the imprint "C6". Can someone help me find out what this is please?

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